RU2564495C2 - Roughing tool for processing of shaped surface in tire repair - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to repair of tire. Roughing tool for tire surface grinding off comprises roughing wheel drive, roughing wheel coupled with said drive and grinding-off depth limiter secured to said wheel drive. Said grinding-off depth limiter comprises two running guide rollers secured thereto and spaced apart along common axis of revolution so that roughing wheel is located between two said guide rollers. Rouging wheel can penetrate beyond preset diameter of said guide rollers corresponding to preset depth of grinding off. Note here that roughing wheel axis of revolution is located, in fact, perpendicular to common rotational axis of guide rollers.

EFFECT: efficient recovery of damaged tire.

19 cl, 8 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates generally to tire repair and, in particular, to a method and apparatus for preparing a damaged portion of a tire to be patched.

BACKGROUND

Tires are known to be susceptible to damage. Damage can occur when a tire collides with road debris, such as nails, glass and stones, as well as during tire mounting and removal. Damage can also form a tire defect. Damage can occur on the inside or outside of the tire, or damage can be through, such as a puncture or rush. In addition, damage can occur along the tread area, sidewalls or shoulders that are located between the tread area and the sidewall. A damaged part of a tire generally refers to a part of a tire that needs to be repaired, and the need for said repair may arise for any reason.

When restoring a damaged area of a tire, a patch is usually used to close and seal it. The patch is generally made of a polymer or elastomeric material, such as natural or synthetic rubber. The patch may further comprise reinforcement extending in the patch, which may be formed of metal wire or cord made of any textile material, in order to partially replace the function of any damaged tire reinforcement. In addition, the patch can be attached to the tire by means of adhesive or vulcanized with it. A damaged area can be prepared before applying the patch. For example, scraps and any damaged material can be removed, the damaged part can be cleaned and / or adhesives or a bonding agent applied to the damaged area.

SUMMARY OF THE INVENTION

Specific embodiments of the present invention comprise methods and apparatus for preparing a portion of a tire for repair. Specific embodiments of the present invention comprise a grinding tool for grinding a tire surface, comprising:

rotating means for rotating the grinding wheel;

a grinding wheel rotatably attached to rotating means; and

a depth gauge attached to the rotating means, said depth gauge comprising two guide rollers rotating and spaced apart from one another.

Specific embodiments of the present invention further comprise a depth gauge adapted to be used with a grinding tool, which comprises a grinding wheel and rotational means for rotating the grinding wheel, comprising:

a mounting element connected to rotational means;

two guide rollers rotating and spaced apart from one another, rotatably attached to the mounting element.

Specific embodiments of the present invention also comprise a method of preparing a portion of a tire for repair, comprising the steps of:

(a) ensure that a grinding tool is used to grind the surface of the tire, said tool comprising:

rotating means for rotating the grinding wheel;

a grinding wheel rotatably attached to rotating means; and

depth gauge, comprising a mounting element connected to rotating means, and two guide rollers freely rotating and spaced apart from one another, rotatably attached to the mounting element,

(b) engaging said tool with a tire surface; and

(c) the tire material is removed using the specified tool from the surface of the tire to the desired depth.

The above and other objects, features and advantages of the present invention will become apparent after reading the following detailed description of specific embodiments of the present invention with reference to the accompanying drawings, in which like reference numbers indicate like parts of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

1 shows a perspective view of one embodiment of a grinding tool for roughening a tire surface.

Figure 2 shows a side view of the grinding tool shown in figure 1.

Figure 3 shows a front view of the grinding tool shown in figure 1.

Figure 4 shows a rear view of the depth gauge of the grinding tool shown in figure 1, with the grinding wheel removed for clarity.

FIG. 5 is a partial sectional view of a mounting member showing sliding adjustment between a guide roller holder and a mounting holder in order to control the depth of a tire with a sanding tool.

FIG. 6 is a side view of a grinding tool shown in FIG. 1 interacting with a tire surface during a grinding operation.

7 shows a perspective view of a section of a tire having a patch area prepared along the surface of a tire as a result of a grinding operation using the described example of a grinding tool.

On Fig shows a perspective view of the section along the line 8-8 of the heterogeneity formed in the tire surface as a result of the roughening operation.

DETAILED DESCRIPTION OF THE INVENTION

In specific embodiments of the present invention, methods and apparatus are provided for preparing for repair of a portion of a tire that may be damaged or require other types of repairs. In particular, the damaged part of the tire is prepared to facilitate repair by sealing and / or filling the damaged part using a patch and / or a patch material. Sometimes there is a need to restore or strengthen a specific area of the tire, for example, in case of damage to the tire during its operation. The specified damaged area may be located in some area of the tire, such as a sidewall, shoulder or tread. Typically, the area to be repaired is prepared before applying a patch to facilitate adhesion. For example, a tire surface may be cleaned using a solvent and / or by roughening or grinding. For some specific patches in the tire surface, a recess to the required depth can be made by removing material from the tire surface to form a patch receiving region having the required depth. The patch receiving area may have a constant or varying depth, measured from the original surface of the tire.

Specific embodiments of such methods may include the step of taking a grinding tool to roughen or grind the surface of the tire, said tool comprising rotating means for rotating the grinding wheel, a grinding wheel rotatably attached to the rotating means, and a depth gauge. The depth gauge may include a mounting element attached to the rotating means, and two rotating and spaced apart guide rails, rotatably attached to the mounting element. According to particular embodiments, the guide rollers are freely rotatable and / or selectively positioned relative to the grinding wheel, whereby the user can adjust the relative position of the guide rollers and the grinding wheel, so that the grinding wheel extends beyond the diameter of the guide rollers to a desired distance, moreover, the required distance corresponds to the required depth of roughening or grinding. Accordingly, such methods may further comprise adjusting the depth of the grinding performed by the grinding tool by changing the position of the guide rollers relative to the grinding wheel along the mounting element. For the purposes of the present description, the indicated distance corresponding to the required grinding depth is substantially equal to the maximum depth of the tire material removed from the tire surface and takes into account the dimensions of both the guide rollers and the grinding wheel. In cases where the grinding wheel is worn, for example, due to prolonged use, the position of the guide rollers can be adjusted relative to the grinding wheel to achieve the same required grinding depth as in the case of an un-worn grinding wheel.

According to particular embodiments, the mounting element may comprise: (1) a mounting holder attached to the rotational means, and (2) a guide roller holder attached to the mounting holder. In this design, the guide rollers can be rotatably attached to the guide roller holder. In addition, the guide roller holder is adapted to be selectively positioned relative to the grinding wheel. According to another embodiment, or in addition to this, the guide roller holder is adapted to be selectively positioned relative to the mounting holder. Since the guide rollers can be rotatably attached to the guide roller holder, the required grinding depth can be adjusted, as described above, to adjust the position of the guide rollers relative to the grinding wheel.

According to particular embodiments, the method may also comprise stages in which the tool is brought into interaction with the tire surface and tire material is removed from the tire surface to the desired depth using the specified tool. After the removal step, the method may further comprise applying at least one patch material to the area of the tire from which the tire material has been removed.

The methods generally described above and their use or implementation will be further described in detail below by way of example various embodiments.

As described in the embodiments shown in FIGS. 1-6, a grinding tool 10 may be used to prepare the tire inner surface for repair. According to the specific embodiment shown in FIGS. 1-5, the grinding tool 10 may include rotational means for rotation grinding wheel, which according to one variant of implementation are rotary drive 20. The rotary drive 20 can be controlled pneumatically, hydraulically or can be actuated by other known methods. In some cases, the rotary actuator 20 may include an inclined neck 24, and therefore, the grinding tool 10 can be described as an angle grinder. According to one embodiment, the tilted neck 24 can be tilted so that the axis of rotation of the rotary drive 20 is oriented at an angle of approximately 45 ° relative to the work surface, although any other angle suitable for grinding the tire surface can also be used. In use, the rotary actuator 20 can be actuated by pressing the trigger 20A, but other methods of actuating the actuator 20 can also be used. According to one embodiment, the grinding wheel 22 may be rotatably connected to the rotary actuator 20.

Since it is necessary to control the removal of tire material and to remove material from the tire surface only to a predetermined depth, the grinding tool 10 may further comprise a depth gauge 30 attached to the rotary drive 20. The depth gauge 30 may comprise two guide rollers freely rotating and spaced apart from each other. 32 and the mounting member 31. The mounting member 31 may include a mounting holder 34 and a guide roller holder 36 to support the guide rollers. According to particular embodiments, the guide roller holder 36 can essentially be U-shaped, i.e. the guide roller holder may have two legs spaced apart from each other, with each leg connected at one end to a transverse element substantially perpendicular to the legs. According to other embodiments, the guide roller holder 36 may substantially be V-shaped or any other shape suitable for receiving the guide rollers 32 in the desired position. According to one embodiment, the guide rollers 32 can be rotatably connected to the holder 36. In general, any known mechanism can be used to rotate any guide roller 32 to the holder 36. For example, as shown in FIGS. 1-2, such a mechanism 33 comprises a bolt with a shoulder or any other connecting element, a screw or a rod (with a lock nut, a stud, etc.) for connecting any guide roller 32 to the holder 36 and, in general, to the mounting element 31, and such a fur the anism also comprises a shaft 33 defining a rotation axis A. For the purposes of clarity of the present description, the term “freely rotatable” is used to indicate that the rotation of the guide roller 32 about its axis of rotation is essentially unlimited and that the guide roller is not driven and does not interact with rotating or driving means. Accordingly, the operator can bring the guide rollers 32 into contact with the tire surface and guide the grinding tool 10 along a predetermined grinding path by means of the guide rollers 32 rotating around its axis. According to the embodiment shown in FIGS. 1-3, the rotation axes of the guide rollers 32 are coaxial (i.e., they share the same rotation axis, even though each roller has its own independent shaft 33). In General, the axis of rotation of the guide rollers 32 may be parallel. In other embodiments, the guide rollers may share a common axis. 1-3, the rotation axis of the grinding wheel 22 is substantially perpendicular to the rotation axes of the guide rollers 32, and it is understood, however, that other angular relations between the rotation axes of the grinding wheel and any of the guide rollers can be used.

To minimize sliding of the guide rollers 32 over the tire surface during roughening, at least part of the periphery 32A of any guide roller 32 may have a generally non-slip or non-slip surface. Any known method or mechanism may be used to create a textured or non-slip surface. For example, the non-slip surface may comprise a structure formed along the periphery 32A, for example, by corrugation or sandblasting, or a structure or coating deposited on the specified periphery, for example, sanding paper, a coating of solid particles or a layer of material having a high coefficient of friction, such like rubber or any other elastomer or similar material.

According to one embodiment, the depth gauge 30 may be attached to the rotary actuator 20 with an annular bracket 35. Since it may be necessary to replace one limiter 30 with another, adjust the position of the limiter 30 on the rotary actuator 20 or completely remove the limiter 30 from the rotary actuator 20, an element may be used 37 for adjusting the ring bracket, as a result of which the gripping force of the ring bracket 35 on the rotary drive 20 can be selectively weakened and strengthened depending on the required the position of the limiter 30. According to other embodiments, the depth limiter 30 may comprise any other structure or structure adapted to be coupled to the rotary drive 20.

According to particular embodiments, the guide rollers 32 are selectively positioned relative to the grinding wheel 22. In addition, in the example shown in FIG. 2, the grinding wheel 22 may extend a certain distance beyond the diameter of the guide rollers 32, and this distance corresponds to the required depth D _Δ grinding. As shown in FIGS. 1-5, the necessary grinding depth D _Δ can be adjusted by changing the position of the guide roller holder 36 relative to the mounting holder 34, the guide rollers 32 being connected to the holder 36. The holder 36 can be adjustable to any mounting holder 34 In a known manner, allowing selective placement of the guide roller holder 36 relative to the mounting holder 34. For example, as shown in FIGS. 3-5, the holder 36 may be selectively connected the mounting bracket 34 using at least one connecting element 38, the holders 34, 36 are also in sliding mutual positions (i.e. each of said holders can slide along to the other holder for adjusting the position of each holder relative to each holder). It is understood that for installation with the possibility of adjusting the guide rollers along the limiter 30 can be used other known devices, structures and means. For example, the guide roller holder 36 can be selectively connected to the mounting holder 34 via a threaded rod, whereby the operator can adjust the position of the holder 36 relative to the mounting holder 34 to adjust the grinding depth D _Δ by rotating the threaded rod, for example, by means of a hand wheel, kinematically associated with the specified threaded rod. In such a design, relative movement of the holder 36 may occur in the direction of the axis of rotation of the threaded rod. According to another embodiment, or in addition to this embodiment, the guide rollers 32 can be selectively adjusted independently or together along the stop 30 relative to the stop wheel holder 37, the setting member 34 and relative to the grinding wheel 22. For example, a groove can be made along the part of the holder 36 along of which a corresponding guide roller 32 can be selectively located. According to the indicated embodiments, it is understood that the mounting element 34 and the holder 36 can be consistent or positionally fixed relative to each other, while guiding roliki32 can be selectively adjusted along the depth limiter 30.

According to particular embodiments, the depth gauge 30 may comprise a scale to assist the operator in selecting the position of the guide rollers 32 to achieve the required roughing depth D _Δ . The scale can indicate the distance or depth, or any other parameter that facilitates the work of the operator. In one embodiment, the scale may be scaled in millimeters, but other units of depth may also be used (eg, fractional inches). According to another embodiment, or in addition to this, the depth gauge 30 may comprise a vernier scale for measuring the necessary grinding depth D _Δ .

According to the embodiment shown in FIGS. 1, 3 and 4, the guide rollers 32 are in the form of a truncated cone and a hollow inner region or concavity. Accordingly, the guide rollers 32 can be described as hollow truncated cones. This design facilitates the placement of the grinding wheel 22 in it, as shown in particular in FIG. 3, and the periphery of the grinding wheel, as can be seen in the drawing, extends into the cavity or concavity of each guide roller 32. According to another embodiment, used other configurations of the guide rollers 32, which can be of any known design, including, for example, incomplete truncated cones and disk-shaped rollers, which may or may not have a hollow recess, similarly the implementation described above. In the case of disk-shaped guide rollers 32, the depth gauge 30 may have a size at which the guide rollers 32 are located at a sufficient distance from each other, as a result of which the space between the guide rollers is larger than the diameter of the grinding wheel 22.

According to the embodiment shown in FIGS. 1-3, the grinding wheel 22 is a wheel having an outer surface forming part of a sphere. In other words, the outer surface of the wheel as a whole is located at a distance of a constant radius r _S from the center point of the sphere. In the embodiment shown in the drawings, the outer surface of the wheel forms a spherical segment, which is created by the section of the sphere in two parallel planes. According to some embodiments, the radius r _{S of the} spherical surface of the grinding wheel can essentially be equal to the rolling radius r _W of the guide rollers 32. According to another embodiment, or in addition to this, the radius r _{S of the} grinding wheel 22 can essentially be equal to the radius r _{W of the} guide rollers 32 plus the required grinding depth D _Δ . In other embodiments, the grinding wheel 22 may be a wheel having any other shape, such as, for example, a cylindrical grinding wheel or a bevel wheel.

Grinding tools described in this application are used to form heterogeneity along the surface of the tire to prepare the surface of the tire for repair. As shown in Fig.6, the grinding tool 10 interacts with the inner surface 42 of the tire in the required position to generate any necessary inhomogeneities. In the example shown in FIG. 7, the heterogeneities 44 are in the form of grooves to prepare the tire for receiving a patch. In the example shown, the grooves form a contour or perimeter around the repair area or patch application area 48. It will be apparent to those skilled in the art that the dimensions of area 48 may be slightly larger than the width of the selected patch, for convenient placement and adjustment of the patch, and for ensuring exact matching between the bus and the patch.

As shown in FIG. 8, the roughened inhomogeneities 44 shown in FIG. 7 are formed using the tool shown in FIGS. 1-3. As shown in the drawing, the inhomogeneities 44 have a concave profile corresponding to the shape of the partially spherical grinding wheel 22, although inhomogeneities having a different shape can be formed using known grinding wheels of various shapes.

According to one embodiment, the grinding tool 10 can be used to substantially remove all tire material in the patch application area 48 to the required depth D _Δ . According to another embodiment, or in addition to this, the material can be peeled off from the tire manually using a force sufficient to overcome the bonding forces between the material that must be removed and the part of the tire that must remain intact. After removing tire material in the patch application area, at least one patch or repair material can be placed in the patch application area 48.

Despite the fact that the specified invention is described on the example of specific options for its implementation, it should be understood that the description is for illustrative purposes only and is not a limitation. Accordingly, the scope of protection and the content of the present invention should be specified only by the paragraphs of the attached claims.

Claims (19)

1. A grinding tool for grinding the surface of the tire, containing:
rotating means for rotating the grinding wheel;
a grinding wheel rotatably attached to rotating means; and
a grinding depth limiter attached to rotary means, comprising two rotating guide rollers rotatably attached to the depth limiter and spaced apart from each other along a common axis of rotation, so that the grinding wheel is located between these two guide rollers, wherein the grinding wheel is made with the possibility of passing a predetermined distance beyond the diameter of the specified guide rollers, corresponding to the required grinding depth, at ohm buffing wheel axis of rotation is substantially perpendicular to the common axis of rotation of the guide rollers. 2. The grinding tool according to claim 1, in which the guide rollers are made with the possibility of selective positioning relative to the grinding wheel. 3. The grinding tool according to claim 2, wherein the depth gauge further comprises a mounting holder attached to the rotational means and a guide roller holder attached to the mounting holder, said two guide rollers being rotatably attached to the guide roller holder and the guide holder the roller is made with the possibility of selective positioning relative to the mounting holder to achieve the necessary depth of grinding, which is equal to the distance between the bottom part of the buffing wheel and the bottom of the guide rollers. 4. The grinding tool according to claim 1, in which the periphery of each guide roller contains a non-slip surface. 5. The grinding tool according to claim 1, in which the periphery of the grinding wheel passes into the cavity of each guide roller. 6. The grinding tool according to claim 5, in which the guide rollers are truncated cones. 7. The limiter of the depth of abrasion of the tire surface used with a grinding tool, which contains a grinding wheel and rotational means for rotating the grinding wheel, containing:
a mounting element connected to rotational means;
two rotating guide rollers located at a distance from each other along a common axis of rotation to form a cavity for receiving a grinding wheel between them;
wherein the mounting element is arranged to arrange the axis of rotation of the grinding wheel substantially perpendicular to the general axis of rotation of the guide rollers. 8. The depth gauge according to claim 7, in which the guide rollers are made with the possibility of selective positioning relative to the grinding wheel. 9. The depth gauge according to claim 8, in which the mounting element comprises a mounting holder connected to the rotating means, and a guide roller holder connected to the mounting holder, the two guide rollers being rotatably mounted to the guide roller holder, and the guide roller holder with the possibility of selective positioning relative to the mounting holder to achieve the required grinding depth, which is equal to the distance between the lower part of the grinding wheel and bottom of guide rollers. 10. The depth gauge according to claim 7, in which the periphery of each guide roller contains a non-slip surface. 11. The depth gauge according to claim 7, in which the periphery of the grinding wheel passes into the cavity of each guide roller. 12. The depth gauge according to claim 11, in which the guide rollers are truncated cones. 13. The method of preparing the tire for repair, in which a grinding tool is used to grind the tire surface according to claim 1, the specified tool is brought into interaction with the tire surface and the specified amount of tire material is removed from the surface of the tire with the specified tool to the required depth. 14. The method of claim 13, further comprising applying at least one patch material to a portion of the tire related to the removed tire material. 15. The method of claim 14, wherein the guide rollers are selectively positioned relative to the grinding wheel, the method further comprising adjusting the grinding depth using the grinding tool by changing the position of the guide rollers relative to the grinding wheel along the mounting element. 16. The method according to p. 15, in which the mounting element comprises a mounting holder connected to rotational means, and a guide roller holder connected to the mounting holder, the two guide rollers being rotatably attached to the guide roller holder and the guide roller holder selectively positioned relative to the mounting holder to achieve the required depth of grinding, which is equal to the distance between the lower part of the grinding wheel and the lower part of the guide rollers. 17. The method according to p. 13, in which the periphery of each guide roller contains a non-slip surface. 18. The method according to p. 13, in which the periphery of the grinding wheel passes into the cavity of each guide roller. 19. The method according to p. 18, in which the guide rollers are truncated cones.

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